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Prevention of Corrosion

In a small to...

Question

In a small town along the costal area, it is observed that iron objects rust
easily. Being an industrial town, it also faces air pollution problem. Identify
any 4 factors which are contributing to rusting phenomenon.

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Solution

Moisture or Humidity
Pollutents such as SO₂ and NO₂ act as atalyst for the corroson reaction.
Temperatute: Coatal area proveds the most appropreate temperature for the corroson of iron to take place.
Slats: The salts wich are present in water act as catalyst for the reaction.

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A, B, C, D and E are the five towns out of which two are hill stations and the rest are in plains. Two towns which are in plains have harbours. Four towns out of five are capitals and two are industrial towns. The population of town is less than 5 lakh. It is 20 lakh of one town and more than 50 lakh of two towns. Two towns are on the same latitudes and the other two are on the same longitudes. Latitudes and longitudes of both the harbours are different and out of these, one is an industrial town. The population of both the industrial towns is more than 50 lakh. The longitudes of one hill station and one of the industrial towns are same. The latitudes and longitudes of the other hill station and the other harbour are different. One industrial town is neither a hill station nor a harbour. None of the hill stations is an industrial town. The hill station of which longitude is the same as that of a harbour, is a capital. B is a hill station while the longitudes of A and E are same. E is a harbour. The latitude of D and C are same and the population of D is 20 lakhs. Both the harbours are capitals one of them is an industrial town.

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